Three of the pedestrians died at the scene. They were identified as 60-year-old Patti Doornbos, of Calgary, Alberta, Canada, 72-year-old Robert Bonta and 71-year-old Karen Bonta, both of Iowa.

Doornbos' husband and the only surviving victim, 60-year-old Ronald Doornbos, died from injuries related to the crash in June at a Canadian hospital.

At about 9:12 a.m. on March 13, Bashaw was driving a 1998 Ford Explorer SUV. Investigators determined Bashaw's 1998 Ford Explorer SUV was traveling at about 53 mph in a 35 mph zone, said Sgt. Joaquin Enriquez, a Maricopa County Sheriff's Office spokesman.

At 9:12 a.m., the SUV hopped a curb, striking the four who had been walking westbound in the intersection’s south crosswalk near Saguaro and Palisades boulevards, officials said.

Bashaw remained on scene after the crash and jumped out of his vehicle, running over to begin CPR on two of the pedestrians until fire personnel directed him to stop, Enriquez said.

Bashaw was examined at the scene, and it was determined that he was not impaired, Enriquez said.